Toothed gearing.



B. WIESENGRUND 6: W. F. ROBERTS.

TOOTHED GBARING. APPLIOATION FILED JULY 20, 1911.

Patentd Feb. 27, 1912,

5 SHEETS-SHEET 1.

Inventors MtnegsesQ 0 B. WIVESENGRUND & WIP. ROBERTS;

. TOOTHED GEARING. APPLICATION FILED JULY 20, 1911.

Patented Feb. 27, 1912.

5 SHEETS-SHEET 2.

' Inventors WIESBNGRUND & W. P. ROBERTS.

TOOTHED GEARING. APPLIOATION FILED JULY 20, 1911.

Patented Feb. 27,1912.

' 5 SHEETS-SHBET 3.

B. WIBSENGRUND & W. F. ROBERTS.

' I'OOTHBD GBRING.

APPLICATION FILED IULY 9.0, 1911.

1,019,001 Patented Fel 27, 1912.

5 SHEETSSHEET 4.

WITNESSES. (5 W lWENTO s 6 I R B. WIESENGRUND & W. P. ROBERTS. TOO THED GEARING. APPLICATION FILED JULY 20, 1911.

1,01 9,001 1 Patented Feb. 27, 1912.

. 5 SHBETS-SHEET 5.

W/TNES s'Es [NVEN TOR 5 MM 2 "uni ar as assets t me BEBNHARD 'WIESENGRUND ANI- WI-LLIfiM FREDERICK ROBERTS, F WEST DRAYTOiN,

ENG-LAND. 7

'roo'rnnfn Guanine.

Specification of Letters Patent.

To all whom 2'5 may concern:

Be it. known that we, BERNHARD lVIEsnx- GRUND, asubject of the. German Emperor, and 'WiLmaai Fiunnnnoit ROBERTS, a subject ofl-lis lllajesty the King of Great Britain, both residents of \Vest Drayton, in the county of llliddlesex, England, have in vented a new and useful llllpltlVel'llQllt in Toothed Gearing, of which the following is a specification.

in high speed driving gearing for large powers, particularly in double or multiple helical spur gearing of great tare width, it of the utmost importance to insure as far as possible an even distribution of load over the whole face. width, in order to avoid uneven wear of the teeth, incalculable dilt'erences in stresses in ditl'crent portions of the teeth and vibration which results 'ti'oni uneven load distribution. The most. favorable distribution of load over the whole available face width should he obtained without sacrificing perfect rigidity of the supports of the driving pinions and driven wheels in speed reducing gears, or driving wheels and driven pinions in speed increasing gears. lt-

obvious that v. ith very small diameter of driving or driven pinions which are necessary to keep the surface speed within admissible limits it. will be impossible to obtain a satisfactorily even distribution of the load when applying or delivering the power at one end of a very wide pinion on account of the distortion (twisting) of such pinion due to torsional stresses. in order to obtain the desired even distribution of load we make therefore each pinion in two parts, each part forming hollow sleeve and provided with a coupling flange at one end. Immediately adjoiningthe coupling flanges journals are formed on the sleeves and'thc ends oi the. sleeves which are not provided with coupling flanges are also formed as journals. Between the two journals oi each sleeve the teeth are cut, right hand helical on one, leflrhand helical on the other, or double or multiple helical on either. If double or multiple helical'tcetl'i are cut on both sleeves each can be regarded as a corn plete pinion, the two treated in the same way as the two parts of one. The coupling flanges of the two sleeves form their inner ends. and are connected by a third coupling member connected to one driving shaft. passing through one of the sleeves, or to two driving shafts each passing through one of the sleeves, the latter arrangement being necessary where two sources of power have to work oirone pinion or two pinions with common axis. The coupling flanges on the sleeves can also be bolted together directly, and the driving shaft connection to the sleeve elicited by means of keys or other suitable means. The coupling may he of the solid flanged type with parallel or taper bolts or oi the claw type to admit of slight longitudinal movement and expansion, or any other suitable type of coupling may be chosen. Where the connection of the sleeves to the driving shaft or shafts is etl'ected by lteys, a coupling may be altogether dispensed with.

In the accompanying drawings: Figure l is a sectional view showing two part sleeve pinions together with one methodof coupling the shafts of the small pinions. Fig. 1 is a sin'ii'lar view showing; the shafts of the pinions bolted together by suitable fia' gas carried by the shafts. Figs. 2, and l show what are practicallv similar views with difplingsand Fig. 5 shows diagrannnatically one application of the invention in a case in separate which the power from or to four a single points is transmit-ted to or trom shaft.

In Fig. l the four journals 6 c c and e are shown as supported by the hearings f f and f the bearing f being preferably a. single one provided with a central space to accomn'iodate the coupling. The two parts a. a. indicate the sleeve pinion which may also be regarded as separate pinions gearing into gear wheels 5 shown as two parts of one wheel or two wheels mounted .on

a common slwve it or they may he mounted dii'cc'tlv on the driving or driven shaft k as the case may be and as shown in Fig. '1. As shown in Fig. l c is the driving shaftor in the of two sources of powerapplicd in the same axial line c and 0' both act as driving-shafts coupled hy coupling members 5 5" and (Z to the sleeve pinions 0- (L2. In Fig. 1 practically the same construction is shown except that the gears 5 5 are secured directly to shaft is while in Figs. 2 and 3 the Patented Feb. 27, 1912. Application filed July 20, 1911. Serial No. 639,551.

fercnt also known forms of teeth and coushatts c are shown vas connected to the sleeves by means of keys while in Fig. 4 a claw coupling is indicated while F1". 5 shows a form of coupling similar to that in Fig. 1.

lie

The various forms of gears and couplings indicated being well known need not be further described.

It will. be seen that with all the arrange ments described the drivin force is always applied from the center or etween the gear or pair of gears used, so that any torsion affects equally the portions of the gear or the two gears which are situated symmetrically to the connection of the driving shaft or shafts with the sleeves. In the case of the use of two sources of power in one axis at opposite ends of the gear or gears, the arrangement has the further advantage, that however different the amount of energy supplied by one and the other, the total energy will be evenly distributed over the gear or gears from the central point in which the connection of the driving shafts with the gear or gears is effected.

The description given heretofore refers equally to speed increasing gears, the shaft or shafts through which the power is delivered to the driven machine or machines taking the place of the driving shaft or shafts, as according to this invention one or more power shafts whether receiving power as for example from a turbine or whether transmitting it as for example to a dynamo receive or transmit the power in lines parallel and co-axial with rigidly supported split or pairs of gearwheels which are not relatively movable otherwise than parallel to their axis the power being imparted to or transmitted from such gears through a connection made between the shaft and gears at a point between said gears.

In all drawings we have shown two pinions engaging with one wheel on opposite sides of the wheel in one plane, but in some cases even more pinions may be used suit-' ably arranged around the circumference of the wheel.

VVhat we claim is 1. In toothed gearing, rigidly supported pairs of gear wheels which are not relatively movable except in lines parallel to their axis, one or more power shafts receiving power from a point or points outside the gear wheels but in direct line therewith and transmitting such power to a point intermediate of the gear wheels and means for transmitmeans for transmitting the power from saidpoint to a point or points outside said gear wheels but in direct lines therewith.

3. In toothed gearing, pairs of gear wheels which are not relatively movable except in lines parallel to their axis, one or more power shafts receiving power from a point or points outside the gear wheels but in direct lines therewith and transmitting such power to a point or points between the gear wheels and means for transmitting such power from said point to the gear wheels and a single shaft driven therefrom.

4-. In toothed gearing,rigidly supported pairs of gear wheels which are not relatively movable except in lines parallel to their axis, a single driving shaft, means for transmitting power to said gears and means. for transmitting said power from the gear wheels to a point or points between said gear wheels and from saidpoint or points to a point or points outside the gear wheels but in direct line therewith.

In testimony whereof we have hereunto set our hands in the presence of two subscribing witnesses.

BEltNllAltD WIESENGRUND. I WILLIAM FREDERICK ROBERTS. Witnesses:

SAMUEL CowLns, LILY COWTAN.

rigidly supported 

